Cartridge Immersion Heater 500 W Watts Sheath Material Incoloy(R) Screw Plug Material Brass Watt Density 53 sq in Heater Voltage 120V AC 1 Phase Overall Length 5 1/4 in Control Range 266 Degrees F 3/4 in NPT Min Immersion Depth 4 1/4 in Flange Material PTFE Includes Brass Screw Plugs